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.TH curl_pushheader_bynum 3 "9 Jun 2023" "libcurl" "libcurl"
.SH NAME
curl_pushheader_bynum - get a push header by index
.SH SYNOPSIS
.nf
#include <curl/curl.h>

char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num);
.fi
.SH DESCRIPTION
This is a function that is only functional within a
\fICURLMOPT_PUSHFUNCTION(3)\fP callback. It makes no sense to try to use it
elsewhere and it has no function then.

It returns the value for the header field at the given index \fBnum\fP, for
the incoming server push request or NULL. The data pointed will be freed when
this callback returns.  The returned pointer points to a "name:value" string
that will be freed when this callback returns.

.SH EXAMPLE
.nf
/* output all the incoming push request headers */
int curl_push_callback(CURL *parent,
                       CURL *easy,
                       size_t num_headers,
                       struct curl_pushheaders *headers,
                       void *clientp)
{
  sizt_t i = 0;
  char *field;
  do {
     field = curl_pushheader_bynum(headers, i);
     if(field)
       fprintf(stderr, "Push header: %s\\n", field);
     i++;
  } while(field);
  return CURL_PUSH_OK; /* permission granted */
}

curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, curl_push_callback);
.fi
.SH AVAILABILITY
Added in 7.44.0
.SH RETURN VALUE
Returns a pointer to the header field content or NULL.
.SH "SEE ALSO"
.BR CURLMOPT_PUSHFUNCTION "(3)," curl_pushheader_byname "(3),"
